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Optics Letters

Optics Letters

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  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3163–3165

Ultraviolet band edge photorefractivity in LiNbO 3 : Sn crystals

Feifei Xin, Guoquan Zhang, Xinyu Ge, Shiguo Liu, Li Xuan, Yongfa Kong, and Jingjun Xu  »View Author Affiliations


Optics Letters, Vol. 36, Issue 16, pp. 3163-3165 (2011)
http://dx.doi.org/10.1364/OL.36.003163


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Abstract

The ultraviolet (UV) band edge photorefractivity of Sn-doped LiNbO 3 (LN:Sn) at 325 nm has been investigated. A sharp decrease of beam distortion, which is accompanied by a significant increase in the photoconductivity, is observed in LN:Sn crystals with Sn-doping concentrations at or above 2.0 mol % . The diffraction efficiency, the holographic recording sensitivity and response rate, and the two-wave coupling gain coefficient are greatly enhanced when the Sn-doping concentration reaches 2.0 mol % or more. Unlike LiNbO 3 doped with Hf in which the UV gratings can be erased easily by a red beam, the UV gratings in LN:Sn can withstand long-term red beam illumination. Electrons are determined to be the dominant light-induced charge carriers responsible for the UV band edge photorefraction. The observed enhancement on the UV band edge photorefractivity is found to be associated with the showup of an absorption band around 325 nm in LN:Sn crystals with Sn-doping concentrations at or above 2.0 mol % .

© 2011 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(160.3730) Materials : Lithium niobate
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Materials

History
Original Manuscript: June 7, 2011
Revised Manuscript: July 15, 2011
Manuscript Accepted: July 16, 2011
Published: August 11, 2011

Citation
Feifei Xin, Guoquan Zhang, Xinyu Ge, Shiguo Liu, Li Xuan, Yongfa Kong, and Jingjun Xu, "Ultraviolet band edge photorefractivity in LiNbO3:Sn crystals," Opt. Lett. 36, 3163-3165 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-16-3163

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